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(11) | EP 1 001 292 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Polymer fiber optical transmission system |
(57) We have determined that unlike the most multimode silica fiber, multimode polymer
fiber often exhibits a delay characteristic that has a broad low dispersion region
where propagation delay of spatially restricted optical pulses remains relatively
constant. This low dispersion region is centered around the center axis of the fiber
core as a function of launch position. By directing a transmitted optical pulse to
this region, we have determined that optical pulse dispersion can be significantly
reduced without the need for using the prior art technique of using a single mode
fiber spliced in series with the multimode fiber to reduce dispersion. A polymer fiber
based optical transmission system using this arrangement exhibits relaxed alignment
tolerances between the optical source and polymer fiber, while reducing dispersion
and increasing bandwidth-length product. |